Monstrous Nightmare (5e Creature)

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Monstrous Nightmare[edit]

Huge dragon, unaligned


Armor Class 24 (natural armor)
Hit Points 287 (23d12 + 138)
Speed 30 ft, climb 30 ft, fly 80 ft.


STR DEX CON INT WIS CHA
25 (+7) 20 (+5) 23 (+6) 6 (-2) 20 (+5) 6 (-2)

Saving Throws Str +12, Dex +10, Con +11, Wis +10
Skills Perception +10, Stealth +10
Damage Resistances fire
Senses darkvision 60 ft., passive Perception 20
Languages understands Common and Draconic, but cannot speak
Challenge 16 (15,000 XP)


Aggressive. As a bonus action, the nightmare can move up to its speed toward a hostile creature it can see.

Brave. The nightmare has advantage on saving throws against being frightened.

Keen Smell. The nightmare has advantage on Wisdom (Perception) checks that rely on smell.

Self-Immolate. As a bonus action, the nightmare lights itself on fire, along with anything it is wearing or carrying, for 1 minute. While on fire, a target within 5 ft. of the nightmare takes 24 (7d6) fire damage, which the nightmare is immune to. If the target is a creature, it must make a DC 20 Constitution saving throw or take 24 (7d6) fire damage on a failed save and half as much damage on a successful one. The nightmare cannot use this feature again until after a short or long rest.

Rampage. When the nightmare reduces a creature to 0 hit points with a melee attack on its turn, the nightmare can take a bonus action to move up to half its speed and make a bite attack.

Reckless. At the start of its turn, the nightmare can gain advantage on all melee weapon attack rolls it makes during that turn, but attack rolls against it have advantage until the start of its next turn.

Relentless (Recharges after a Short or Long Rest). If the nightmare takes 14 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead.

Wounded Fury. While it has 10 hit points or less, the nightmare has advantage on attack rolls. In addition, it deals an extra 7 (2d6) damage to any target it hits with a melee attack.

ACTIONS

Multiattack. The nightmare makes two bite attacks.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 18 (2d10 + 7) piercing damage. Instead of dealing damage, the nightmare may grapple a target, if it is Huge or smaller.

Tail. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 16 (2d8 + 7) bludgeoning damage and the target must succeed a DC 18 Strength or be knocked prone.

Fire Burst (Recharges 5-6). The nightmare exhales fire in a 30 by 5-foot line. Each creature in that area must succeed a DC 20 Dexterity saving throw or take 42 (12d6) fire damage, or half as much damage on a successful one.

Wind Blast (Recharges after a Short or Long Rest). The nightmare beats its wings. Each creature within 10 feet of the dragon must succeed a DC 20 Dexterity or take 16 (2d8 + 7) bludgeoning damage and be knocked prone.

Swallow. The nightmare makes one bite attack against a Medium or smaller target it is grappling. If the attack hits, the target is also swallowed, and the grapple ends. While swallowed, the target is blinded and restrained, it has total cover against attacks and other effects outside the nightmare, and it takes X (4d6) acid damage at the start of each of the nightmare's turns. A nightmare can have only one creature swallowed at a time.
If the nightmare takes 60 damage or more on a single turn from the swallowed creature, the nightmare must succeed on a DC 17 Constitution saving throw at the end of that turn or regurgitate the creature, which falls prone in a space within 15 feet of the nightmare. If the nightmare dies, a swallowed creature is no longer restrained by it and can escape from the corpse by using 25 feet of movement, exiting prone.

REACTIONS

Unbridled Fury. In response to being hit by a melee attack, the nightmare can make one melee weapon attack with advantage against the attacker.

Monstrous-nightmare-01.png
Please maintain a safe distance Source
No, no, no, it can set itself-

on fire...

—A friend of a fighter who thought touching a nightmare was a good idea.

Of all the lesser dragon-kin, one of the most ferocious and savage is the aptly named Monstrous Nightmare. It is similar to a large wyvern, with a serpentine neck and tail, and a low profile, crawling on its wings when not in flight. They have large horns sprawling from the backs of their heads, which vary in size with age, and two rows of large spines from the base of their neck all the way down to the tip of their tail, both serving the purposes of visual display. These dragons easily reach lengths of 60 feet, as well as a 68-foot wingspan and 5000 lbs. weight, and are well known for their pension for aggression, stubbornness, and fury, with most warriors hesitant to go up against them.

Hot Headed. Forests inhabited by Monstrous Nightmares are some of the most dangerous places for commoners to travel through, as they are incredibly territorial and proud dragons. Males, in particular, will fight to defend their territory, even going so far as to protect the offspring of females that are not theirs as males will kill them to mate with the female. This shows a rarely seen softer side of these dragons, often overshadowed by their ferociousness.
This is not without reason, however, as these dragons are feared for both their firey temperments and their firey bodies. Unlike red dragons, Monstrous Nightmares' bodies produce a green-gel, chemically similar to kerosene. This sticky substance is not only able to fire from its mouth in a napalm-like blast more powerful than a normal fire, but also is secreted from the dragon's skin coating it's entire body. This allows for a visually stunning display, where the Nightmare lights itself entirely on fire, becoming effectively untouchable.
This is especially dangerous as Monstrous Nightmares are incredibly strong and, despite their large size, actually quite quick and agile on the ground. However, they are far less agile in the air, where their long tails and many barbules create lots of drag: simply put, they're fast flyers in a straight line, but struggle to make tight turns and cannot pull up from a full speed dive, and advantage to push in combat. An even greater concern for the dragon is its 'pilot light,' some sort of flame that burns within the dragon and ignites their gel starting from when they hatch: should this light go out, due to old age, overexertion, or injury, the dragon loses the ability to maintain body heat, becoming hypothermic, becomes pale skinned and weak, as the oxygen-rich blood rushes to its center away from its muscles, and unable to self-immolate. If the 'pilot light' is not relit, the Nightmare will die.

Torchlight Tutor. Despite their fearsome reputation, as stated earlier Nightmares do have a softer side, which means they can be trained by humanoids. As with between fellow warriors, the relationship between a Nightmare and its rider is based on mutual respect: while this may seem like suicide, a good way to start training is to gently place one's hand upon the dragon's snout, and show they're not a threat. Feeding time, as with many animals is bonding time and Nightmares are, to many new riders' surprise, omnivores, allowing for a wide selection of choice feeds, with corn, crab, fish, mutton, and wild boar being special favorites. Be aware when considering training a Monstrous Nightmare, however, that they are proud and stubborn, making them hard to control and very disobedient, in addition to just being easily distracted by things as small as butterflies and flowers.



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